Question

My template looks like:

  <h2>Oracle</h2>

  <% @q_oracle.each do |q| %>
    <%= link_to(q.title + ' (' + q.answer_count.to_s + ') ' + q.question_id.to_s, 'http://stackoverflow.com/' + q.question_answers_url) %>  </br>

  <% end %>


  <h2>Ruby and Rails</h2>

  <% @q_ruby.each do |q| %>
    <%= link_to(q.title + ' (' + q.answer_count.to_s + ') ' + q.question_id.to_s, 'http://stackoverflow.com/' + q.question_answers_url) %>  </br>

  <% end %>

So the temlate consists the static titles (h2) and loops through the array. I am searching the way to avoid copy-paste code in the my template. Something like:

@hash = { 'Oracle' => @q_oracle, 'Ruby and Rails' => @q_ruby }

@hash.each { |@t, @a|

  <h2>@t</h2>

  <% @a.each do |q| %>
    <%= link_to(q.title + ' (' + q.answer_count.to_s + ') ' + q.question_id.to_s, 'http://stackoverflow.com/' + q.question_answers_url) %>  </br>

  <% end %>
}

Is it possible?

Answer 1

Yes you can do it.

Ruby 1.9 solution

In Ruby 1.8 this solution can be used when titles order doesn’t matter. In Ruby 1.9 titles would appear in order they were inserted in hash.

Just place this variable to your controller action:

@hash = { 'Oracle' => @q_oracle, 'Ruby and Rails' => @q_ruby }

And access this variable from your view:

<% @hash.each do |t, a| %>
  <h2><%= t %></h2>
  <% a.each do |q| %>
    <%= link_to(q.title + ' (' + q.answer_count.to_s + ') ' + q.question_id.to_s, 'http://stackoverflow.com/' + q.question_answers_url) %>  </br>
  <% end %>
<% end %>

Ruby 1.8 with sorted keys

This method sorts keys so they appear in alphabetical order.

<% @hash.keys.sort.each do |t| %>
  <h2><%= t %></h2>
  <% @hash[t].each do |q| %>
    <%= link_to(q.title + ' (' + q.answer_count.to_s + ') ' + q.question_id.to_s, 'http://stackoverflow.com/' + q.question_answers_url) %>  </br>
  <% end %>
<% end %>

Ruby 1.8 with arrays

This method would behave like Ruby 1.9 in any ruby version – titles would appear in order they were added.

Variable @hash must be initialized as:

@hash = [ ['Oracle', @q_oracle], ['Ruby and Rails',@q_ruby] ]

View must be updated to:

<% @hash.each do |title_with_questions| %>
  <h2><%= title_with_questions[0] %></h2>
  <% title_with_questions[1].each do |q| %>
    <%= link_to(q.title + ' (' + q.answer_count.to_s + ') ' + q.question_id.to_s, 'http://stackoverflow.com/' + q.question_answers_url) %>  </br>
  <% end %>
<% end %>